function User (name, age, career, work) {
  this.name = name
  this.age = age
  this.career = career
  this.work = work
}

function Factory (name, age, career) {
  let work
  switch (career) {
    case 'coder':
      work = ['写代码', '写系分', '修Bug']
      break
    case 'product manager':
      work = ['订会议室', '写PRD', '催更']
      break
    case 'boss':
      work = ['喝茶', '看报', '见客户']
      break
    case 'xxx':
    // 其它工种的职责分配
  }
  return new User(name, age, career, work)
}

const staffing = new Factory('李梅', 23, 'product manager')
console.log(staffing);